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The O2 sensor provides necesary information to the computer. If the vehicle is burning too much fuel there will be insufficient O2 in the exhaust. If there is too MUCH O2 in the exhaust there is a possibility that the vehicle is not performing properly and also the possibility that you will burn valves, although your EGR valve should prevent that. Periodic replacement of your O2 sensor is just good maintenance and helps with good fuel economy.

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โˆ™ 2005-09-29 18:43:53
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Q: Is it important to replace the O2 sensor on 1998 escort?
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